18年生 잣나무 次代檢定林의 家系別 毬果 着生量의 變異와 遺傳力

전상근,정동준,장용석 경희대학교 생명자원과학연구원 1998 硏究論文集 Vol.19 No.-

경기도 가평, 광주 그리고 충청북도 영동 지역에 조성한 잣나무 種子多産系 次代檢定林에 있어서 地域別, 家系別 18年生 着果量의 分散을 分析 檢討하고 遺傳力을 推定하였던 바 다으과 같은 結果를 얻었다. 1. 着果量은 지역별로 차이를 나타내여 가평 지역의 個體木當 平均看果數가 0.85個, 광주 지역이 0.87個, 영동 지역이 0.72個였으며, 3個 지역 전체 平均看果數는 0.82였다. 2. 3個 지역에 있어서 平均看果數가 가장 많았던 家系는 20番家系(0.96個)였으며 가장 看果가 적었던 家系는 21番家系(0.74個)였다. 3. 3個 지역 看果數는 變異에 가장 큰 影響을 미치는 分散要因은 plot내의 個體木間에 있었으며, 家系, 지역, Block 그리고 이들 要因들의 相互作用이 有意하게 영향하고 있었다. 그러나, 가계×지역의 상호작용은 중요 分散要因이 아니었다. 4. 看果數의 單一木遺傳力은 0.04~0.24, 家系遺傳力0.006, 家系遺傳力은 0.349였다. 5. 看果數에 대한 單一木 및 家系遺傳力은 지역에 따라 차이가 나타났으나 個體木當 平均看果數가 만았던 광주 지역이 높은 경향을 보였다. The objectives of this study were to analyze variation and to estunate heritabilities for cone production of 18-year-old open-polhated progenies of Korean White Pine in three different sites. The results were summarized as follows ; 1. Family, site, block, and interactions among these factors were significant source of variance for cone production. But the effects of family × site interaction were not relahvely large as compared with other source of variance. 2. Average values were 0.85 at Kapyung site, 0.87 at Kwangju site, 0.72 at Youngdong site and 0.82 overall three sites m mean of cone number per tree, respectively. 3. Family of No. 20 showed excellent value of 0.96 in mean of cone number per tree over all sites. 4. Individual-tree and family heritabilities were estimated 0.040∼24 and 0.16∼0.69 for cone production, respectively. For overall the sites, estunate of individual-tree heritability was 0.006 and that of family was 0.349 for cone production. 5. Heritability estunates vaned with testing site, and those for family were higher than for individual-tree.

잣나무 풍매차대검정림의 계절별·가계별 생장과 동화생리 특성에 관한 연구

전상근,정동준,장용석 경희대학교 생명자원과학연구원 1999 硏究論文集 Vol.20 No.-

This study was carried out to investigate vegetative growth and assimilation physiological characteristics of Pinus koraiensis S. et Z.. The results can be summarized as follows: 1. Average values were 5.9±0.4m in height, 8.9±1.0cm in diameter of breast height, 12.0±3.2m^(2) in basal area and 46.5±14.2m^(3) per ha in volume all over 17 years. No. 20 Family showed excellent growth of 27% (11.3㎝) in mean diameter of breast height, 15%(6.8m) in mean height, 54%(15.8m^(2)) in mean basal area and 68%(79m^(3)) in mean volume than total mean value respectively. Otherwise Family No. 3 showed the badest growth of 16%(7.5㎝), 12%(7.9m^(2)) and 38%(29.0m^(3)) than total mean value. 2. The changes of seasonal photosynthesis rate by increasing luminous intensity showed that family No. 20 was the upper rank, family No. 10 was the middle and the lower rank was family No. 3. As the season has changed from winter to summer, the photosynthesis rate was increased. 3. Chlorophyll contents was increased from winter to summer, especially No. 20 family showed more contents than the others. 4. The weight of assimilation tissue(gr), length of needle(cm), width of needle(cm) and number of stoma of family No. 20 showed any more values than the others. 5. As the season has changed from winter to summer, the value of family No. 3 showed more than the others in water utilization rate all over season and values showed increasing tendency.

18年生 잣나무 次代檢定林의 樹高·直徑生長의 遺傳力 및 改良效果

전상근,정동준,장용석 경희대학교 자연과학종합연구원 1998 자연과학논문집 Vol.4 No.-

The objectives of this study were to analyzed to variation and to estimate heritabilities and genetic gains for height and diameter growth of 18-year-old open-pollinated progenies of Korean White Pine in three different sites. The results were summarized as follows; 1. Family, site, block, and interactions among these factors were significant source of variance for tree height and diameter growth. The effects of family × site interaction were relatively large as compared with other source of variance. 2. Average values were 6.5m in height and 10.5cm in diameter at Kapyung site, 6.2 m and 9.8cm at Kwangju site, 4.9m and 6.5cm at Youngdong site, and 6.0 m and 9.1cm overall these three sites, respectively. 3. Family of No. 20 showed excellent growth of 6.8m in mean height, 10.5cm in mean diameter overall sites. 4. Individual-tree and family heritabilities were estimated 0.12-0.22 and 0.65-0.80 for height growth, and 0.05-0.15 and 0.59-0.78 for diameter growth, respectively. For overall the sites, estimates of individual-tree heritabdity was 0.38 for height and 0.25 for diameter, and those of family were 0.89 for height and 0.82 for diameter. 5. Heritability estimates varied with testing site, and that for height were higher than for diameter. 6. Given equal intensity of selection (l0%), combined selection showed the most efficient genetic gains for height and diameter.

加平地域 17年生 잣나무 次代檢定林의 家系別 生長特性

全尙根,鄭東浚,張容碩 경희대학교 생명자원과학연구원 1997 硏究論文集 Vol.18 No.-

This study was carried out to investigate the Specific property for tree growth of 17-year-old progeny of Korean White Pine in Ka-pyung. The performance of the 8 general height-dbh models fitted to 1,664 height-dbh data compiled from Ⅰ, Ⅱ, Ⅲ volume classes of families using linear regression method, was compared in connection with several statistical test and growth principle of height. The results can be summarized as follows : 1. Average values were 8.9±1.0cm in diameter and 5.9±0.4cm in height all over the 25 families. 2. No. 20 Family showed excellent growth of 11.3cm in mean diameter, 6.8m in mean height and 78.8m^(3) in mean volume respectively, and No.5 Family showed the badest growth of 27.0m^(3) in mean volume. 3. When volume by the difference of volume ratio ±20% in families mean volume about total mean volume were classified(Ⅰ, Ⅱ, Ⅲ), average values of volume were 66.5±7.5m^(3) in upper volume class(Ⅰ), 46.3k 4.8m^(3) in middle volume class(Ⅱ) and 30.6±3.2m^(3) in lower volume class(Ⅲ) 4. By 8 general height-dbh curve model, in which individual tree height is estimated from the dbh of individual tree in 3 volume classes(Ⅰ, Ⅱ, Ⅲ), there is no height differences in statistical test such as mean difference(MD), standard deviation of difference(SDD), standard error of difference(SED), coefficient of determination(R^(2)), but Parabolic, Fresse, Log, Korson and Prodan functions were no fitted in with general growth principle of height. So height-dbh curve models of Petterson, Kennel and Michailow showed statistically performance and also coincided with general growth principles of height.

잣나무 풍매차대검정림의 가계별·지역별 생장과 수분생리 특성에 관한 연구

전상근,정동준,장용석 경희대학교 생명자원과학연구원 1999 硏究論文集 Vol.20 No.-

경기도 가평지역과 충청북도 영동지역에 조림된 동일한 모수를 가진 동일한 25개가계의 차대검정림에 대한 생장과 수분생리와의 관계를 살펴보면, 두 지역에서 생장이 가장 우수한 20번가계는 가평지역의 생장이 영동지역보다 ㏊당 약 80.92㎥ 정도 많은 영양생장을 보였으며, 생장이 가장 불량한 3번가계에서도 가평지역에서 ㏊당 약 27.99㎥ 많은 생장을 보였다. 또한 초기 원형질분리점(π_0)에서는 20번가계, 3번가계 모두 영동지역이 가평지역보다 낮은 Water Potential을 나타내고 있는데, 이것은 동일한 유전력을 지닌 가계에서도 조림지역의 환경에 따라 Water Potential의 차이가 생기며, 이에 따라 생장에도 차이가 나타나는 것으로 사료된다. 즉 수분조건이 양호한 가평지역에서는 그 만큼 수분 스트레스를 적게 받아 생장도 양호하게 나타났다고 할 수 있다. 앞으로 수분조건에 큰 영향을 주는 인자인 토양에 대한 연구가 함께 이루어져 잣나무 적지적수 판단에 기초자료가 될 수 있을 것으로 생각된다. This study was conducted to reveal the characteristics of the growth by locality for Korean White Pine planted in Kapyung Kyunggi-Do and Youngdong, Choongchunbuk-Do. The effects of water potential on the growth were also analyzed. For this, local site quality was first evaluated and several stand variables such as number of trees survived, mean DBH, mean height, basal area per hectare, and volume per hectare by stand age were measured and summarized for each locality. Family No. 20 showed excellent growth in two sites and at Kapyung a more volume about 80.92m^(3)/㏊ than at Youngdong Family No. 3 showed poor growth and at Kapyung a more volume about 27.99m^(3)/㏊. Also at incipient plasmolysis (π_(0)) showed families No. 20 and No. 3 at Kapyung a lower water potential that at Youngdong. In the family which has same heritability, the growth is considered to be different because of different water potential by local climatic conditions. From this in Kapyung site which has good moisture condition and power water stress, the growth of white pine showed good.

정신과 환자의 성폭행 유병률 및 관련 요인

김대호,이해원,노성원,최준호,박용천,정승아,남정현 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The direct causal relationship between the experience of sexual assault and development of psychiatric disorder remains uncertain. However, studies consistently show that those with history of this horrendous event report a wide range of symptoms, higher level of distress, and various social and psychological problems. This study investigated the prevalence and associated risk factors in a cohort sample of 340 Korean psychiatric patients. Methods : Data from consecutive 340 new patients were gathered at a psychiatric department of a university affiliated hospital. Participants completed Life Events Scale, Symptom Checklist-90-R, State-Trait Anxiety Inventory, Beck Depression Inventory, and Dissociative Experiences Scale. Results : History of sexual assault was reported by 11.5% of respondents (women 18.6% ; men 2.1%). Bivariate analysis revealed that women (p<.001), divorced or widowed and never been married (p<.05), unemployed and students or housewives (p<.05), monthly income more than 2 million Won (p<.05) were associated significantly with experience of sexual assault. All the scores from the scales but Beck Depression Inventory were significantly higher for the sexually assaulted. Multiple logistic regression analysis revealed that women were 12 times more likely to be sexually assaulted (Odds ratio=12.24, 95% CI=3.51 -42.64). Other risk factors included younger age and interacdon of post-traumatic stress disorder (PTSD) and Global Severity Index. Conclusion : This study supported the risk factors of sexual assaults identified in western literature. Clinicians can be alert for any history of sexual assault when younger women with PTSD present higher level of symptomatology.

韓國 南西部의 德蔭과 全州-金銀鑛床에 對한 岩石地球化學的 硏究

Chung Han Yoon(尹定漢),Yong Won John(田溶元),Hyo Taek Chon(全孝澤) 대한자원환경지질학회 1988 자원환경지질 Vol.21 No.4

Minor elements such as Ag, As, Au, Bi, Cd, Cu, Co, Ni, Pb, Rb, Sb, Sr and Te were analyzed by atomic absorption spectrophotometry and induced coupled plasma spectrophotometry in order to investigate pathfinders for gold in quartz porphyry, granite porphyry and vein materials in Jeonjuil gold - silver mine, and in altered biotite granites and vein materials in Dukum gold - silver mine. In Dukum gold - silver mine, it is observed that Au contents have positive relation with As, Co, and Rb contents, but negative relation with Bi contents in altered biotite granites. Au contents have positive relation with Ag, As, Co and Te contents in vein materials. In Jeonjuil gold - silver mine, it is observed that Cd, Rb, Sr and Te are enriched near ore vein in quartz porphyry and granite porphyry. Au contents have positive relation with As, Cd, Cu, Fe₂O₃ and K₂O in vein materials.

The Relationship between Type 2 Diabetes Mellitus and Non-Alcoholic Fatty Liver Disease Measured by Controlled Attenuation Parameter

Chon, Young Eun,Kim, Kwang Joon,Jung, Kyu Sik,Kim, Seung Up,Park, Jun Yong,Kim, Do Young,Ahn, Sang Hoon,Chon, Chae Yoon,Chung, Jae Bock,Park, Kyeong Hye,Bae, Ji Cheol,Han, Kwang-Hyub Yonsei University College of Medicine 2016 Yonsei medical journal Vol.57 No.4

<P><B>Purpose</B></P><P>The severity of non-alcoholic fatty liver disease (NAFLD) in type 2 diabetes mellitus (T2DM) population compared with that in normal glucose tolerance (NGT) individuals has not yet been quantitatively assessed. We investigated the prevalence and the severity of NAFLD in a T2DM population using controlled attenuation parameter (CAP).</P><P><B>Materials and Methods</B></P><P>Subjects who underwent testing for biomarkers related to T2DM and CAP using Fibroscan® during a regular health check-up were enrolled. CAP values of 250 dB/m and 300 dB/m were selected as the cutoffs for the presence of NAFLD and for moderate to severe NAFLD, respectively. Biomarkers related to T2DM included fasting glucose/insulin, fasting C-peptide, hemoglobin A1c (HbA1c), glycoalbumin, and homeostasis model assessment of insulin resistance of insulin resistance (HOMA-IR).</P><P><B>Results</B></P><P>Among 340 study participants (T2DM, n=66; pre-diabetes, n=202; NGT, n=72), the proportion of subjects with NAFLD increased according to the glucose tolerance status (31.9% in NGT; 47.0% in pre-diabetes; 57.6% in T2DM). The median CAP value was significantly higher in subjects with T2DM (265 dB/m) than in those with pre-diabetes (245 dB/m) or NGT (231 dB/m) (all p<0.05). Logistic regression analysis showed that subjects with moderate to severe NAFLD had a 2.8-fold (odds ratio) higher risk of having T2DM than those without NAFLD (<I>p</I>=0.02; 95% confidence interval, 1.21–6.64), and positive correlations between the CAP value and HOMA-IR (ρ=0.407) or fasting C-peptide (ρ=0.402) were demonstrated.</P><P><B>Conclusion</B></P><P>Subjects with T2DM had a higher prevalence of severe NAFLD than those with NGT. Increased hepatic steatosis was significantly associated with the presence of T2DM, and insulin resistance induced by hepatic fat may be an important mechanistic connection.</P>

Analysis and Design of a Current-fed Two Inductor Bi-directional DC/DC Converter using Resonance for a Wide Voltage Range

Yong-Su Noh,Bum-Jun Kim,Sung-Chon Choi,Do-Yun Kim,Chung-Yuen Won 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.6

In this paper, a current-fed two-inductor bi-directional DC/DC converter using resonance (CF-TIBCR) and its design method are proposed. The CF-TIBCR has characteristics of low current ripple and a high current rating because of two separated inductors. Also, it achieves zero voltage switching for all switches and zero current switching for switches of a low voltage stage by using the resonant tank. Besides, a voltage spike problem in conventional current-fed converters is solved without the need for an additional snubber or clamping circuits. As a result, the CF-TIBCR features high step-up and high efficiency. Since the proposed converter has difficulty achieving the softswitching condition when the converter requires the low voltage transfer ratio, a method that varies the number of resonant cycles is adopted to extend the output voltage range with satisfying the softswitching condition. The principles of the operation characteristics are presented with a theoretical analysis, and the proposed converter is verified through results of an experiment using a laboratory prototype.

NaOH 및 요소처리에 의한 볏짚의 영양가 증진에 관한 연구

정천용,P. D. Moller 한국낙농학회 1983 韓國酪農學會誌 Vol.5 No.3